Summary of Significant Accounting Policies Concentration Risk (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Concentrations
Effective Income Tax Rate Reconciliation, Percent	(8.00%)	1.00%
Licensee 1 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	52.00%		38.00%
Licensee 1 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	70.00%	96.00%
Licensee 2 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	25.00%		36.00%
Licensee 2 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	21.00%
Licensee 3 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	10.00%		12.00%
Licensee 4 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable			11.00%
Licensees in foreign jurisdictions [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	75.00%	2.00%